The problem with the Peanut Butter and Jelly Sandwich? Like most childhood treats, it's rarely as delicious as you remember. However, there's a way to update this classic in a totally sweet way: turn it into a tart. Anchored by a substantial buttery shortbread crust, this peanut butter and jelly pie is sophisticated enough to satisfy adult palates—after all, it's an adaptation of the Rosemary-Scented Date-Nut Bars from The Perfect Finish by Bill Yosses and Melissa Clark—but simple and tasty enough to please eaters of all ages.